Means for testing the progress of work in machines for grinding bodies of revolution



Oct; 20, 1925 1,557,903

H T. TORNBERG MEANS FOR TESTING THE PROGRESS OF WORK IN MACHINES FOR GRINDING BODIES OF REVOLUTION Filed April 18, 1921 O I lNl/E/ITOB ATTORNEYS Patented Oct. 20,

UNITED STATES, PATENT OFFICE.

HENN'ING TEODOB SVENSKA KULLA Kmcnoiu or swnnnn.

' MEANS FOR TESTING THE rnoen Application filed April 18, 1921.

To all whom it may concern:

Be it knqwn that I, Hmvmnc Tuonon ToRNBnno, a subject of the King of Sweden,

residing at Flushing,

Long Island, New

York, have invented certain new and useful speed as that of the working spindle,

Improved Means for of Work in Machines Testing the Progress for Grinding Bodies ofRevolution, of which the following is a specification,

reference being. had to the drawing-accompanying and forming a part 'thereofE.

. In machines of the type for grinding bodies whereof-the surface or surfaces to be ground are figures of revolution, those of rollers for roller bearings, the progsuch as ress of the grinding operation has usually been tested by the w machine fromt me orkman stopping the to time and ascertaining,

with the aid of a caliper-gauge, whether or not the desired been attained.

diameter of This method of testing is,

the body has obviously, time-wasting especially in the later stages when the grinding operation nears completion.

progress of grinding,

is provided, according to tion, with a caliper-gauge,

concentrically with a rotary work ng ranged spindle of the machine,

adapted to rotate at the same preferably In order to facilitate the testing of the the grinding machine the present invenor the like, ar-

said gauge being and to be moved, in order to test' or gauge the movement of away from into or towards the during a return The gauging can thus be performed without stopping the machine, and working spindle, going grinding,

by rotating the gauge with the t with e body under- .a further advantage is gained in that the wear of the gauge as it is body moved along. the

will be a minimum.

In the accompanying-drawings,

Fig. 1 is a longitudinal section of a working spindle of a grinding machine provided with a gage in accordance with the invention.

Fig. 2 isan elevation partly in section ot a portion of a grinding machine embodying my invention, showing the means for moving the caliper gage cut-on or declutching and for operating a device, the grinding ESS OF WORK IN MACHINES FOR OF REVOLUTION.

TORNBERG, 0F FLUSHING, NEKV YORK, ASSIGNOR .ALKTIEBO'LAGET GER-FABRIKEN, 0F GO'IEBORG, SWEDEN, A. CORPORATION 01' GRINDING BODIES Serial in. 462,377.

wheel being shown acting on the work and the gage retracted.

Fig. 3 is a similar view showing the grinding wheel free of the work and the caliper gage advanced in engaging relation with the same.

In the drawing, referring particularly to Fig. 1, 1 designates the rotary working spindle, and 2-designates the body to be This roller is seconvex rolling surface.

known manner, for instance by a cured, in

' ground, which is shown as a roller with a pin A,'Figs. 2 and 3, to the spindle 1, so

as to rotate therewith. Placed on the spindle 1 is a sleeve 3 rotating with the spindle but adapted to be moved axially relatively thereto, the connection for permitting time being for instance a pin 1 attachedto the spindle and located in a slot 5 in the sleeve 3 extending parallel to the axis of the sleeve. The sleeve 3 at one end carries a cali rgauge consisting, for instance, of :1 ed shoulder arm or abutment 6 and a diametrically opposed shoulder arm or abutment 7 seated in a radial slot in-the ring 8 and ad- 'justable in said slot edativcly to the part 6; The adjustment ofthe abutment '7' is .efiected by means of an adjusting. screw 7 threaded 1n the ring. 8, with the head of the screw in position to engage the outer edge of the abutment, which latter is held in its adjusted position by means of a binding screw 7" 8 carried by sleeve 3and engaging the side edge of the abutment. By movin 3, the caliper-gauge can be moved body 2 for the purpose of testingits diame ter when the reciprocating grinding disc has moved away from the body and calipercontacting portions of the gauge. I

The work uge are thus carried by the ring 8 and the fitter is permitted a certain amount of radial free threaded in the outer end of a ring the sleeve along the 1 or floating movement relatively to the sleeve 3. of the ring 8 is provided with a flange 9, engaging the front end of the sleeve 3 and confined loosely in position bymeans of a flanged sleeve 10, shown as having screwthreaded engagement with the sleeve 3, which sleeve is in turn held in position by a suitable lock nut 11, the distance between the outeiyedge'of the fiange-- 9 and inner In the present illustration the back end vface of the. sleeve 10 being such that the ring "also a floating movement in case the work vibrates in relation to the spindle.

Furthermore, if desired, the movement of the caliper-gauge may be controlledhy the feedin mechanism which moves the grinding disc across the body 2, so that the gauge is automatically moved towards or over the bod 2 during the return movement of the grin ing disc away from the body. Thus a cut-E or de-clutching device can be operatively connected with the gauge automatically to cut ofi' or arrest the feed movement of the grinding disc, when the loo 2 has attained the desired diameter, when the gauge can be moved past the body The mechanism above referred to is illustrated in Figs. 2 and 3 where it will be seen that a swingable frame or slide 12,

carrying the grinding disk 9, is connected to the sleeve 3 by means of links 13 and 14. The link 13, which is pivotally and slidahly connected between its ends to the sleeve-3 by means of a pin 13 shown by dottedlines in Figs. 2 and 3, engaging loosely" in a peripheral groove 3 in the slceve'3, is at end pivotally connected with a stationary a l5 scc ured on or forming part of the main frame of the machine. At its other end the link 13 i'sa-pivotally connected with one end of the linkl t, and theother end of link 14 is pivotally connected to the slide 12. The link 14; is preferably made in two parts which slide-endwise relatively to each other, and are connected and normally yieldingly restrained from extension movement by means of a' spring 1 .3 The spring and the expansiblelink 14: permit swinging movement of the slide 12 and of the grinding disk 9 over the roller even though the caliper gage cannot pass over the roller.

Fig. 2 shows the relative positions of the parts, for instance for the commencement of the rinding operation. The slide 12 is assumed to be moving towards the right in Fig. 2 to carry the grinding disk 9 from.

the full line position to the dotted line position. At the same time the link 13 and the caliper gage will also be moved towards the dotted line position, and if the roller has not been ground down sufliciently to permit the caliper gage to pass thereon, further movement of the grinding disk 9 will be permitted by means of the cxpansible link 14 and the spring. lVhen however, the roller has attained the desired diameter, the caliper gage will be permitted to pass over it to the position shown in Fig. 3. in this mess position contact pieces 16 and 1? will he engaged with each other so as to close an electric circuit including an eiectromagnet 18. The electromagnet is shown as operatingoxLa pawl 19 to withdraw it when the magnet is energized, from a ratchet wheel 20 constituting an element of the main drive of the driving disk feed mechanism. Disengagement of the pawl 19 from the ratchet Wheel cuts oil or declntches the main drive from the driving apparatus and the driving operation is thereby arrested.

It will be obvious that the mechanism described in connection with Figs. 2 and 3 may be modified in many ways, since this mechanism is merely'shown as constituting doe means of ell'ecting the requisite movements ofthe caliper gage and the cut-oft or disconnection of the main drive from the grinding machine when the work has been ground to required dimension.

J I claim:

1. Means for testing the progress of grinding operations in grinding" machines having a rotary spindle to carry the body to be ground, said means comprising a gage, an means for mounting said gage relatively to the spindle to rotate with the body to be ground, said gage being movable into gaging relation to the body to be ground.

2. The combination with a rotary work holding device, of a gage mounted relatively to the work holding device for rotation with the work and adapted to engage the work.

3. Thecombination with a rotary work .holding device, of a gauge acaptcd to on gage the work carried thereby, and means for mounting the gangs on the work holder for rotation tl1erewith,land reciprocation axially thereof.

4. The combination with a rotary workmeans for mounting the ring on the spindle to float radially thereof.

(5. In combination with a rotary work holding device, a gage and means forinount ing said gage in relation to said device to rotate in the same dircction thereof, said gagebeing movable into and out of gaging relation to the work to gage the same.

In testimony whereof I have signed my name.

HENNING TE ODOlZ 'lUlilllBEltG.

till 

